Pump



0. FRANCK Jul 18, 1939.

PUMP

Filed Dec. 16, 1936 INVENTOR.

Osage FTefi/VCK, fiafl w. A

ATTORNEYS Patented July 18, 1939 PATENT OFFICE PUlWP Oscar Franck,

New York, N. Y.

Application December 16, 1936, Serial No. 116,099

1 Claim.

My invention relates to pumps and more particularly to pumps designedfor pumping liquids and has for its object to provide a pump of smalldimensions constructed and operating in a novel manner to develop arelatively high pumping power. The invention contemplates further a pumpof the indicated type which is particularly adapted for use inconnection with fountains and especially with miniature fountains andthe like. Other more specific objects will appear from the descriptionhereinafter and the features of novelty will be pointed out in theclaim.

In the accompanying drawing, which illustrates an example of theinvention without defining its limits, Fig. 1 is a sectional elevationof the novel pump embodied in a miniature fountain; Fig. 2 is ahorizontal section taken approximately on the line 22 of Fig. 1; Fig. 3is a similar view on the line 33 of Fig, 1; Fig. 4 is a perspectiveview, partly in section, of a part of the pump casing; Fig. 5 is aperspective view of a second part of said pump casing; Fig. 6 is adetail plan view of an interior element, and Fig. 7 is a detail sideview thereof.

For convenience of description the novel pump has been illustrated in aform adapted particularly for fountains, and more especially miniaturefountains such as are combined with aquariums; it is therefore to bedistinctly understood that the selected exemplification of the inventionin no sense defines the limits thereof either as to details ofconstruction or as to its scope of use.

In the form shown in Fig. 1, the casing of the novel pump consists of amain section and an auxiliary section II, said sections being detachablyconnected with each other in any conven" tional manner as by means ofco-operating flanges l2 and screws l3. The main section ll! of thecasing is provided with an outlet chamber and an outlet l4 leadingtherefrom; the exit end of said outlet l4 may, as illustrated,accommodate a perforated cap I5 either premanently or removably fastenedin place in any convenient way. The auxiliary section II, as shown inFig. 5, is provided with a slot [6 in its annular wall which cooperateswith an internal element of the pump to function as a valve as willappear more fully hereinafter; in the specific form disclosed in theselected example, the bottom of the section II is provided with anannular flange l1 and is otherwise open.

The pump as shown further includes an internal element l8 having aninternally screw threaded hub l9 adapted for threaded engagement withthe bearing projection of a nut or clamping member 2|, in addition,includes a depending flange 22 extending partly around the periphery ofthe element l8 which is preferably of circular form as shown in Figs. 3and 6; with this arrangement, the space between the ends of the flange22 constitutes an inlet to the chamber defined by said flange 22, saidinlet in co-operation with the slot N5 of the casing section IIproviding a valve for the purpose to be more fully set forthhereinafter. The element l8, in addition, is provided with a pluralityof perforations 23 in concentric relation to the hub [9 as shown in Fig.6; the perforations or apertures 23 extend in the direction of the axisof the element l8 and in the assembled pump establish communicationbetween the aforesaid chamber beneath the element l8 as defined by theflanges 22 and the space within the pump casing above said element H3.The projection 20 constitutes a bearing for a shaft 24 to the upper endof which is secured an impeller 25, the arrangement being such that theimpeller 25 rotates in a plane parallel with and above the element l8 asshown in Fig. 1. To provide against unintentional leakage, the shaft 24may extend through a suitable stuffing box 26 and in any case is coupledby means of a connection sleeve 21 or its equivalent to the drivingshaft 28 of a suitable electric or other motor 29; in the illustratedexample of the invention, the motor 29 is suspended from and supportedupon the nut 2| by means of supporting rods 30 as illustrated in Fig. 1.

The interior of the main section II! of the pump casing is provided witha partition member 3| extending transversely across the casing sectionIt in a plane parallel with the plane in which the impeller 25 rotates,said partition member 3| being shaped and dimensioned to provideopposite side openings 32 in the manner illustrated in Figs. 1, 2 and 4.A second partition member 33 projects from the partition member 3| inperpendicular relation thereto and is dimensioned and shaped to fit theinterior of the casing section ill and to extend into proximity andpreferably up to the outlet M in substantial axial registry with theaxis of the latter, as shown in Figs. 1 and l.

In the preferred construction the partition member 3| is located at theinlet end of the outlet chamber of the pump and substantially forming abottom therefor, said member 3| being provided with the opposite sideopenings 32 which communicate with said outlet chamber. The secondpartition member 33, as illustrated in Fig. 1, divides the outletchamber into two separate The internal element l8, q

compartments a each of which communicates with the outlet l4 and is incommunication with one of the openings 32; furthermore the entry end ofthe outlet i4 is divided by said partition member 33, into two separatepassages whereby the compartments a of the outlet chamber areindependently connected with said outlet [4.

In the arrangement selected to exemplify the invention, the pump islocated within a tank or other container 34 which may be of anyconventional type, and is connected with the bottom of said tank 34 bymeans of the internal element [8 and the nut or clamping member 2|; thatis to say, as shown in Fig. l, the bearing projection 20 projectsthrough an opening in the bottom 34 of the tank into the interior of theauxiliary casing member II; the internal element It is screwed upon theprojection 20 until the lower edge of the flange 22 is brought intoengagement with the flange ll of the section II to thereby clamp thepump upon the inside of the tank 34 and the motor and its associatedelements upon the outside thereof. The adjust ment of the internalelement IS on the threaded projection 20 is such that the clampingpressure exerted on the flange I! will be suflicient to secure the pumpand its motor securely in operative position; at the same time theaforesaid clamping pressure is insufiicient to prevent the rotation ofthe casing sections l0 and II relatively to the internal element l8 foradjusting the flow of the water or other liquid to the pump as will bemore fully pointed out hereinafter. In practice, water or other liquidwill be contained in the tank 34 in such an amount that the level of thewater will be slightly above the partition member SI for instance at thepoint indicated by the section indicating line 2-2 in Fig. 1. It will beunderstood that the motor 29, if it is electrically operated, will beconnected with a suitable source of electrical energy and controlled asto starting and stopping by means of a switch of any conventional type.

In practice assuming the motor 29 is operating, the shaft 24 will berotated and accordingly will correspondinly rotate the impeller 25. Asthe impeller is thus operated, water will be forced through the oppositeside openings 32 into the compartments a upon opposite sides of thepartition member 33 and above the partition member 3|. As the action ofthe impeller 25 continues, the volume of the water or other liquid willbe progressively built up in the two compartments at at the same timethe partition member 33 acts to build up and develop pressure in thevolume of water or other liquid so that the latter is forced outwardlythrough the apertures IS in the form of a spray or the like. In theillustrated example of the pump, the water or other liquid after it hasbeen forced through the perforated head I5 may be returned to the tankor other container 34 for repeated use by the pump, or said tank orcontainer 34 may be connected in any convenient manner with a source ofwater or other liquid supply whereby the water or other liquid in thetank or other container 34 is replenished.

The flow of water and consequently the height of the spray may becontrolled by rotatably adjusting the pump casing sections In and II soas to adjust the position of the slot l6 relatively to the space betweenthe opposite ends of the flange 22 of the element l8. As the rotativeadjustment of the pump casing in the manner described continues, more orless of the slot I6 will project over the flange 22 and thereby reducethe size of the inlet through which the water or other liquid entersinto the interior of the pump casing. In other words, the space betweenthe opposite ends of the flange 22 is the equivalent of a slot so thatthe element l8 and the casing if}, H are provided wtih co-operatingslots adjustable relatively to each other at will to control the flow ofwater or other liquid into the pump. It will be understood that theaforesaid rotative adjustment of the pump casing I 0, ll may be readilyaccomplished by simply exerting a force suilicient to overcome theclamping force of the internal element l8 upon the flange 11; when thedesired adjustment has been effected, this clamping force will serve tomaintain the casing I6, II in its set position.

The provision of the partition members 3| and 33 located and arrangedinteriorly of the pump casing as illustrated for instance in Fig. 1,makes it possible to build up volume and pressure Within the pump casingwith the application of only a minimum. amount of pumping power. As aresult, the pump itself may be of small dimensions and compact form andefficiently operated for its intended purpose by a motor of relativelysmall size. While the novel pump is ideal in association with miniaturefountains, the pump is equally well adapted for fountains regardless ofthe size and for many other purposes in which a pump of relativelycompact form and high power is required.

Various changes in the specific forms shown and described may be madewithin the scope of the claim without departing from the spirit of theinvention.

I claim:

A pump comprising a circular casing having an outlet chamber and anupright outlet leading therefrom, and having an inlet slot in itsperipheral wall, a bearing projection extending into said casing inaxial registry with said outlet, a clamping member carried by saidbearing projection exteriorly of said casing, a stationary aperturedelement carried by said projection within said casing and having aninterrupted flange forming an opening adapted to register with saidinlet slot, a driving shaft journalled in said bearing projection, animpeller carried by said shaft and rotatable thereby in a plane parallelwith said element, a horizontal partition member in parallel proximityto said impeller at the inlet end of said outlet chamber provided withopposite site openings leading thereto, an upright partition memberprojecting from said horizontal partition member in approximate registrywith the axis of said outlet whereby said outlet chamber is divided intotwo separate compartments, and a motor mounted on said clamping memberand operatively connected with said driving shaft for operating the sameand said impeller, said casing being rotatably adjustable at willrelatively to said stationary element whereby said inlet slot is shiftedrelatively to the opening of said element to control the flow of liquidinto the pump, and being clamped between said clamping member andstationary element so as to be held in adjusted position by friction.

OSCAR FRANCK.

